What Raw Materials Is UHPC Mainly Composed Of, Their Approximate Proportions, and a Scientific Analysis

【Opening Highlight】Ultra-High Performance Concrete (UHPC) is redefining the strength limits and aesthetic possibilities of building materials as a "superhero of the materials world." As an industry leader with 28 years of full-chain UHPC/GRC/GRG/GRP experience, Qinglong Group will start from the very source of materials to deeply analyze the secrets of UHPC's raw material composition, unveiling the scientific code behind its "high performance" for designers and owners.

### UHPC Raw Material System: Four Core Components Building the Foundation of Superior Performance

The exceptional performance of UHPC stems from its precise raw material proportions and scientific synergy. As a leading domestic UHPC manufacturer, Qinglong Group has developed a mature material formulation system through 28 years of practice. Its core consists of four major categories: cement-based cementitious materials, ultra-fine active admixtures, high-strength fibers, and special admixtures. The proportion of each component must be optimized through rigorous testing to achieve the perfect balance of strength, toughness, and durability.

### Cement-Based Cementitious Materials: The "Skeleton" of UHPC Strength (approximately 30%-40%)

As the matrix material of UHPC, cement-based cementitious materials typically use Portland cement or sulphoaluminate cement with a strength grade of no less than 42.5, accounting for approximately 30%-40%. Qinglong Group strictly controls the mineral composition and fineness of cement in production, optimizing C3S and C2S content to ensure a full hydration reaction and provide fundamental strength to the material. Meanwhile, in accordance with the industry standard General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), which the company participated in drafting, the uniformity deviation of cement-based materials is controlled within ±2%, ensuring product quality stability.

### Ultra-Fine Active Admixtures: The "Secret Weapon" for Density Enhancement (approximately 25%-35%)

To reduce cement content and improve material density, UHPC requires ultra-fine active admixtures such as silica fume, ultra-fine mineral powder, and fly ash, with a total proportion of up to 25%-35%. Silica fume has a particle size of only 1/50 that of cement, filling the microscopic pores between cement particles to create a "dense packing effect." Leveraging the technical advantages of its provincial-level R&D center, Qinglong Group's self-developed composite admixture formula reduces UHPC porosity to below 3%, significantly enhancing impermeability and durability. This technology was fully validated in the light-transmitting concrete project of the Nanjing East Road Century Plaza renovation, which won the Silver Award of the First UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup).

### High-Strength Fibers: The "Tendons" of Toughness Enhancement (approximately 2%-5%)

Fibers are the key component distinguishing UHPC from ordinary concrete, typically steel fibers or ultra-fine polyethylene fibers, accounting for approximately 2%-5%. For large-scale projects, Qinglong Group gives priority to copper-plated steel fibers with a diameter of 0.15-0.2mm, which are distributed in a three-dimensional random orientation to effectively inhibit crack propagation, increasing the material's flexural strength to 5-8 times that of ordinary concrete. In the Dongguan Women and Children's Activity Center project, Qinglong UHPC components successfully achieved large-span curved shapes through fiber reinforcement technology, and the project won the Silver Award of the First GRC Construction Engineering Innovation Award.

### Special Admixtures: The "Regulators" of Performance Optimization (approximately 1%-3%)

Although admixtures account for only 1%-3%, they play a decisive role in the workability and mechanical properties of UHPC. Qinglong Group uses self-developed polycarboxylate-based high-range water reducers with a water reduction rate of over 35%, ensuring good flowability even at low water-binder ratios (0.18-0.25). Defoamers, air-entraining agents, and other components are also compounded to precisely regulate the concrete's bubble structure, preventing excessive porosity from affecting strength. This control of technical details has enabled Qinglong UHPC products to withstand extreme climates in overseas projects in Malaysia, Australia, and other countries.

### Industry Practice of Scientific Proportioning: The Technical Accumulation of Qinglong's 28 Years of Experience

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group understands that "proportioning is the core competitiveness." Through the accumulation of 58 patented technologies, it has established a dynamic proportioning database for different application scenarios: prioritizing compressive strength (up to 150MPa and above) in municipal bridge projects, and optimizing toughness and forming precision in architectural decorative components. This "precise customization" capability has made it a strategic partner of well-known real estate groups such as Poly and Vanke, and has enabled Qinglong UHPC/GRC/GRG/GRP products to be widely used in high-end fields such as landmark buildings and commercial complexes.

【Summary】The raw material composition of UHPC is like a precise symphony orchestra, with each component playing a unique role under scientific proportioning, together performing the architectural masterpiece of "high strength, high toughness, and high durability." With 28 years of full-chain experience as its foundation, Qinglong Group deeply integrates materials science with engineering practice, not only providing the industry with high-quality UHPC products but also driving the innovative development of new architectural decorative materials by participating in industry standard setting and sharing technical achievements. In the future, as materials technology continues to advance, UHPC will surely shine in more fields, and Qinglong will continue its mission of "creating beautiful architecture," contributing Chinese wisdom to the world's architectural aesthetics.